Table of Contents
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Service Manual
ViewSonic
VG150
April 1999 - Version 1.0
THEORY OF CIRCUIT OPERATION
[__Symbot___| With (bits) | Address [Descripon
SS
Mode 800x600
2
133H[1:0]
| The polarity of input synchronization signals
"remy ||"
[itotservemcan an marron
Mode 1024x768
'
2
133H[3:2]
| The polarity of input synchronization signals
["Smcramy | "|" [prowerverncansurroarryve |
free-running clock is 1MHz, and the intended
Scale factor CE
13DH
Scale factor used when generate look up table
for current even pixel multiplication
panel
If the intended maximum refresh rate is 75Hz,
Maximum input
frequency
maximum time tis 1 second, then a value of
1,000,000 us / ius = 1,000,000 is used here.
Maximum refresh rate supported by the LCD
Scale factor CO
13EH
Scale factor used when generate look up for
;
current odd pixel multiplication
Scale factor NE
13FH
Scale factor used when generate look up table
for next even pixel multiplication
Scale factor NO
140H
Scale factor used when generate look up table
for next odd pixel multiplication
Page 22
(Contidential Do Not Copy,
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